Investigation of Stress-Strain State of the Workpiece at Gauge Burnishing of its Holes

Václav, Štefan; Sivtsev, N S; Senderská, Katarína

doi:10.12913/22998624/76093

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…Hence, screws are considered to be isotropic, homogeneous materials and biocompatible from a human perspective. The screws are made using either a conventional machining method or metal powder 3D printing technology where machining is the finishing process (see [34,35,[37][38][39]). However, the screw production technology is not dealt with in this article because the main objective is to verify the material models of the tangential elastic foundation.…”

Section: Methodsmentioning

confidence: 99%

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Mechanics of Screw Joints Solved as Beams Placed in a Tangential Elastic Foundation

et al. 2021

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This article deals with a new original analytical solution of deformation, force and stress states in wood screw joints up to the limit values of pulling out/breaking the screw. The screws are under tension. The wood-to-screw interaction is effectively simplified by introducing several physical model variants using a tangential elastic non-linear foundation. The experimental verification of the proposed models using pull-out tests (i.e., pulling out screws from dry spruce wood in laboratory conditions) confirms the correctness of the proposed models of the elastic linear/non-linear foundation. The validity of the model is also analytically and experimentally verified in the biomechanical model of pulling out screws from the femur of a bovine/human cadaver, which confirms and expands the validity of newly designed screw joint models outside the timber structure area.

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Section: Methodsmentioning

confidence: 99%

“…These may lead to improving the production of screws (i.e., machining and 3D printing technologies, material properties, etc.) (for example, see [20,[34][35][36][37][38][39][40]).…”

Section: Introductionmentioning

confidence: 99%

Mechanics of Screw Joints Solved as Beams Placed in a Tangential Elastic Foundation

et al. 2021

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“…There, we put a 1 mm allowance to each side, which means 2 mm added in diameter. These surfaces will be machined after printing [32].…”

Section: Machining Allowancesmentioning

confidence: 99%

Comprehensive View on Racing Car Upright Design and Manufacturing

et al. 2020

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This paper deals with the design of an upright using a topological optimization. This type of optimization is a relatively young and rapidly evolving area of computational mechanics that seeks to make multiple material savings that cannot be achieved by conventional methods. The optimized upright was utilized in a fully functional prototype of the student formula within the Formula Student competition. The main objective of the optimization was to meet the requirements of the physical properties, weight, stiffness, and strength of the upright. The initial model of the upright was iteratively optimized using topological optimization and a finite element static analysis to obtain the final model. Using the finite element analysis, its behavior in operation within individual load cases was predicted. Symmetry was used to mirror the finished model to obtain the opposite upright of the other side of the car. Finally, the topologically optimized upright was compared with an upright made by conventional methods.

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Numerical Study of Stress-Strain State of Workpiece in Contact Problem of Surface Mandrel Drilling

Sivtsev

Tarasov

2021

Nauka teh.

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In recent years, the economic factor has played an increasingly important role in the selection of technologies for manufacturing machine parts with specified values of normalized parameters of geometric accuracy and quality of working surfaces. As applied to surface plastic deformation processes, this is noticeably manifested in the search for effective friction control methods in the “tool – workpiece” pair, which ultimately determines the distribution pattern and the magnitude of stresses and strains in the workpiece and the tool. It is not possible to obtain a rigorous analytical solution to the problem of establishing a connection between surface conditions, friction, and the stress-strain state of the contacted bodies. In this regard, the construction of mathematical models comes to the fore, the solution of which is possible by numerical methods. The paper presents the results of a numerical study (computational experiment) of a finite-element model of workpiece deformation under various conditions of contact interaction and friction by one of the methods of surface plastic deformation – surface mandrel drilling. The friction coefficient has been chosen as the criterion for assessing the conditions of contact interaction and friction. It is shown that a change in the friction coefficient in the process of surface mandrel has no noticeable effect on the formation of a stress field in the deformable workpiece both in the axial, and in the radial and circumferential directions. At the same time, with an increase in the value of the friction coefficient in the “tool – workpiece” pair and with the associated increase in the force of mechanical resistance to deformation of the workpiece, their growth is observed. A computational experiment has confirmed the presence of non-contact deformations of the workpiece and tool during surface mandrel drilling, as well as as a decrease in the value of residual deformations in the workpiece with a decrease in the coefficient of friction. Balance assessment of contact surface displacements in the workpiece (the inner surface of the hole to be machined) and the tool (mandrel) has shown that the deformations of the tool in the elastic region can lead to a significant decrease in the real tightness of surface mandrel drilling.

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Investigation of Stress-Strain State of the Workpiece at Gauge Burnishing of its Holes

Cited by 5 publications

References 7 publications

Mechanics of Screw Joints Solved as Beams Placed in a Tangential Elastic Foundation

Mechanics of Screw Joints Solved as Beams Placed in a Tangential Elastic Foundation

Comprehensive View on Racing Car Upright Design and Manufacturing

Numerical Study of Stress-Strain State of Workpiece in Contact Problem of Surface Mandrel Drilling

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